Lydia Ko has had a disappointing start to her 2018 season, finishing tied for 19th after an inconsistent final round at the Women's Australian Open in Adelaide.

The former world No.1 seemed to consistently fall further down the leaderboard as the tournament progressed.

Sitting in 12th to begin the day, Ko could only manage an even-par 72 in the final round of action, cancelling any hopes she had of starting her season with a win.

Ko hit three birdies and three bogeys across a frustrating round of golf, in what appears to be a continuation of her 2017 woes.

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The Kiwi had hit an impressive four-under par 68 in Thursday's first round, but couldn't back it up in the following three days.

The 20-year-old has not won an event for 18 months.

She finished with an overall score of three under, eleven shots behind her namesake Jin Young Ko who clinched a start-to-finish victory in the LPGA tour event.

The South Korean golfer won by three strokes over compatriot Hyejin Choi, with Australian Hannah Green a further shot back in third place.

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